{"id":47231,"date":"2024-12-02T14:16:44","date_gmt":"2024-12-02T06:16:44","guid":{"rendered":"https:\/\/fwq.ai\/blog\/47231\/"},"modified":"2024-12-02T14:16:44","modified_gmt":"2024-12-02T06:16:44","slug":"java%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e5%a6%82%e4%bd%95%e4%bf%83%e8%bf%9b%e4%bb%a3%e7%a0%81%e9%87%8d%e7%94%a8%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/47231\/","title":{"rendered":"Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u5982\u4f55\u4fc3\u8fdb\u4ee3\u7801\u91cd\u7528\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u5982\u4f55\u4fc3\u8fdb\u4ee3\u7801\u91cd\u7528\uff1f<\/h1>\n

IT\u884c\u4e1a\u76f8\u5bf9\u4e8e\u4e00\u822c\u4f20\u7edf\u884c\u4e1a\uff0c\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u66f4\u5feb\uff0c\u4e00\u65e6\u505c\u6b62\u4e86\u5b66\u4e60\uff0c\u5f88\u5feb\u5c31\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u6240\u4ee5\u6211\u4eec\u9700\u8981\u8e0f\u8e0f\u5b9e\u5b9e\u7684\u4e0d\u65ad\u5b66\u4e60\uff0c\u7cbe\u8fdb\u81ea\u5df1\u7684\u6280\u672f\uff0c\u5c24\u5176\u662f\u521d\u5b66\u8005\u3002\u4eca\u5929\u7c73\u4e91\u7ed9\u5927\u5bb6\u6574\u7406\u4e86\u300aJava\u51fd\u6570\u5f0f\u7f16\u7a0b\u5982\u4f55\u4fc3\u8fdb\u4ee3\u7801\u91cd\u7528\uff1f\u300b\uff0c\u804a\u804a\uff0c\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff01<\/p>\n

\u901a\u8fc7\u91c7\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u539f\u5219\uff08\u4e0d\u53ef\u53d8\u6027\u3001\u7eaf\u51fd\u6570\u548c\u9ad8\u9636\u51fd\u6570\uff09\uff0cJava \u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u4fc3\u8fdb\u4ee3\u7801\u91cd\u7528\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u4f7f\u7528 final \u5173\u952e\u5b57\u58f0\u660e\u4e0d\u53ef\u53d8\u5bf9\u8c61\/\u5b57\u6bb5\uff0c\u5229\u7528\u7eaf\u51fd\u6570\u786e\u4fdd\u4ee3\u7801\u7684\u53ef\u9884\u6d4b\u6027\uff0c\u4ee5\u53ca\u4f7f\u7528\u9ad8\u9636\u51fd\u6570\u5c06\u51fd\u6570\u89c6\u4e3a\u4e00\u7b49\u516c\u6c11\uff0c\u53ef\u4ee5\u521b\u5efa\u52a8\u6001\u4e14\u53ef\u91cd\u7528\u7684\u4ee3\u7801\u3002<\/p>\n

\"Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u5982\u4f55\u4fc3\u8fdb\u4ee3\u7801\u91cd\u7528\uff1f\u63d2\u56fe\"<\/p>\n

Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u5982\u4f55\u4fc3\u8fdb\u4ee3\u7801\u91cd\u7528<\/strong><\/p>\n

\u51fd\u6570\u5f0f\u7f16\u7a0b\u662f\u4e00\u79cd\u7f16\u7a0b\u8303\u5f0f\uff0c\u5b83\u5f3a\u8c03\u4e0d\u53ef\u53d8\u6027\u3001\u7eaf\u51fd\u6570\u548c\u9ad8\u9636\u51fd\u6570\u7684\u4f7f\u7528\u3002\u901a\u8fc7\u91c7\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u539f\u5219\uff0cJava \u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u521b\u5efa\u66f4\u53ef\u91cd\u7528\u3001\u66f4\u6613\u7ef4\u62a4\u7684\u4ee3\u7801\u3002<\/p>\n

\u4e0d\u53ef\u53d8\u6027<\/strong><\/p>\n

\u4e0d\u53ef\u53d8\u6027\u610f\u5473\u7740\u5bf9\u8c61\u7684\u72b6\u6001\u5728\u521b\u5efa\u540e\u65e0\u6cd5\u66f4\u6539\u3002\u8fd9\u6d88\u9664\u4e86\u526f\u4f5c\u7528\u5e76\u4f7f\u4ee3\u7801\u66f4\u52a0\u53ef\u9884\u6d4b\u3002\u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 final \u5173\u952e\u5b57\u6765\u58f0\u660e\u4e00\u4e2a\u4e0d\u53ef\u53d8\u7c7b\u6216\u5b57\u6bb5\u3002<\/p>\n

\u7eaf\u51fd\u6570<\/strong><\/p>\n

\u7eaf\u51fd\u6570\u662f\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u6838\u5fc3\u3002\u5b83\u4eec\u4e0d\u6539\u53d8\u5916\u90e8\u72b6\u6001\uff0c\u53ea\u4f1a\u8fd4\u56de\u4e00\u4e2a\u503c\u3002\u8fd9\u4f7f\u5f97\u5b83\u4eec\u6613\u4e8e\u6d4b\u8bd5\u548c\u91cd\u7528\uff0c\u56e0\u4e3a\u5b83\u4eec\u7684\u8f93\u51fa\u53ea\u53d6\u51b3\u4e8e\u8f93\u5165\uff0c\u6ca1\u6709\u5176\u4ed6\u5916\u90e8\u56e0\u7d20\u3002<\/p>\n

\u9ad8\u9636\u51fd\u6570<\/strong><\/p>\n

\u9ad8\u9636\u51fd\u6570\u662f\u63a5\u53d7\u6216\u8fd4\u56de\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u7684\u51fd\u6570\u3002\u5b83\u4eec\u5141\u8bb8\u5c06\u51fd\u6570\u4f5c\u4e3a\u4e00\u7b49\u516c\u6c11\uff0c\u4ece\u800c\u53ef\u4ee5\u8f7b\u677e\u521b\u5efa\u52a8\u6001\u548c\u53ef\u91cd\u7528\u7684\u4ee3\u7801\u3002<\/p>\n

\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n

\u4ee5\u4e0b\u662f\u4e00\u4e2a Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u4ee3\u7801\u91cd\u7528\u7684\u5b9e\u6218\u6848\u4f8b\uff1a<\/p>\n

import java.util.List;\nimport java.util.stream.Collectors;\n\npublic class CodeReuse {\n\n    public static void main(String[] args) {\n\n        \/\/ \u521b\u5efa\u4e00\u4e2a\u5b57\u7b26\u4e32\u5217\u8868\n        List<String> names = List.of(\"John\", \"Jane\", \"Peter\", \"Mary\");\n\n        \/\/ \u4f7f\u7528 FilterStream \u96c6\u5408\u8fdb\u884c\u8fc7\u6ee4\n        List<String> filteredNames = names.stream()\n                                           .filter(name -> name.length() > 4)\n                                           .collect(Collectors.toList());\n\n        \/\/ \u4f7f\u7528 MapStream \u96c6\u5408\u8fdb\u884c\u6620\u5c04\n        List<String> upperCaseNames = names.stream()\n                                               .map(name -> name.toUpperCase())\n                                               .collect(Collectors.toList());\n\n        \/\/ \u6253\u5370\u7ed3\u679c\n        System.out.println(filteredNames);\n        System.out.println(upperCaseNames);\n    }\n}<\/pre>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff1a<\/p>\n
    \n
  • filter()<\/code> \u8fc7\u6ee4\u4e86\u5217\u8868\u4e2d\u957f\u5ea6\u5927\u4e8e 4 \u7684\u540d\u79f0\u3002<\/li>\n
  • map()<\/code> \u5c06\u5217\u8868\u4e2d\u7684\u6bcf\u4e2a\u540d\u79f0\u90fd\u8f6c\u4e3a\u5927\u5199\u3002<\/li>\n<\/ul>\n
    \u8fd9\u4e24\u79cd\u64cd\u4f5c\u90fd\u662f\u4f7f\u7528 Java 8 \u7684\u6d41 API \u5b9e\u73b0\u7684\uff0c\u8be5 API \u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u529f\u80fd\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u53ef\u91cd\u7528\u7684\u4ee3\u7801\u7247\u6bb5\uff0c\u8fd9\u4e9b\u4ee3\u7801\u7247\u6bb5\u53ef\u4ee5\u5e94\u7528\u4e8e\u4efb\u4f55\u7c7b\u578b\u7684\u6570\u636e\u96c6\u5408\uff0c\u800c\u65e0\u9700\u91cd\u5199\u4efb\u4f55\u4ee3\u7801\u3002<\/p>\n
    \u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300aJava\u51fd\u6570\u5f0f\u7f16\u7a0b\u5982\u4f55\u4fc3\u8fdb\u4ee3\u7801\u91cd\u7528\uff1f\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6587\u7ae0\u77e5\u8bc6\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u5982\u4f55\u4fc3\u8fdb\u4ee3\u7801\u91cd\u7528\uff1f IT\u884c\u4e1a\u76f8\u5bf9\u4e8e\u4e00\u822c\u4f20\u7edf\u884c\u4e1a\uff0c\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u66f4\u5feb\uff0c\u4e00\u65e6\u505c\u6b62\u4e86\u5b66\u4e60\uff0c\u5f88\u5feb\u5c31\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u6240\u4ee5\u6211\u4eec\u9700\u8981\u8e0f\u8e0f\u5b9e\u5b9e\u7684\u4e0d\u65ad\u5b66\u4e60\uff0c\u7cbe\u8fdb\u81ea\u5df1\u7684\u6280\u672f\uff0c\u5c24\u5176\u662f\u521d\u5b66\u8005\u3002\u4eca\u5929\u7c73\u4e91\u7ed9\u5927\u5bb6\u6574\u7406\u4e86\u300aJava\u51fd\u6570\u5f0f\u7f16\u7a0b\u5982\u4f55\u4fc3\u8fdb\u4ee3\u7801\u91cd\u7528\uff1f\u300b\uff0c\u804a\u804a\uff0c\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff01 \u901a\u8fc7\u91c7\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u539f\u5219\uff08\u4e0d\u53ef\u53d8\u6027\u3001\u7eaf\u51fd\u6570\u548c\u9ad8\u9636\u51fd\u6570\uff09\uff0cJava \u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u4fc3\u8fdb\u4ee3\u7801\u91cd\u7528\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u4f7f\u7528 final \u5173\u952e\u5b57\u58f0\u660e\u4e0d\u53ef\u53d8\u5bf9\u8c61\/\u5b57\u6bb5\uff0c\u5229\u7528\u7eaf\u51fd\u6570\u786e\u4fdd\u4ee3\u7801\u7684\u53ef\u9884\u6d4b\u6027\uff0c\u4ee5\u53ca\u4f7f\u7528\u9ad8\u9636\u51fd\u6570\u5c06\u51fd\u6570\u89c6\u4e3a\u4e00\u7b49\u516c\u6c11\uff0c\u53ef\u4ee5\u521b\u5efa\u52a8\u6001\u4e14\u53ef\u91cd\u7528\u7684\u4ee3\u7801\u3002 Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u5982\u4f55\u4fc3\u8fdb\u4ee3\u7801\u91cd\u7528 \u51fd\u6570\u5f0f\u7f16\u7a0b\u662f\u4e00\u79cd\u7f16\u7a0b\u8303\u5f0f\uff0c\u5b83\u5f3a\u8c03\u4e0d\u53ef\u53d8\u6027\u3001\u7eaf\u51fd\u6570\u548c\u9ad8\u9636\u51fd\u6570\u7684\u4f7f\u7528\u3002\u901a\u8fc7\u91c7\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u539f\u5219\uff0cJava \u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u521b\u5efa\u66f4\u53ef\u91cd\u7528\u3001\u66f4\u6613\u7ef4\u62a4\u7684\u4ee3\u7801\u3002 \u4e0d\u53ef\u53d8\u6027 \u4e0d\u53ef\u53d8\u6027\u610f\u5473\u7740\u5bf9\u8c61\u7684\u72b6\u6001\u5728\u521b\u5efa\u540e\u65e0\u6cd5\u66f4\u6539\u3002\u8fd9\u6d88\u9664\u4e86\u526f\u4f5c\u7528\u5e76\u4f7f\u4ee3\u7801\u66f4\u52a0\u53ef\u9884\u6d4b\u3002\u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 final \u5173\u952e\u5b57\u6765\u58f0\u660e\u4e00\u4e2a\u4e0d\u53ef\u53d8\u7c7b\u6216\u5b57\u6bb5\u3002 \u7eaf\u51fd\u6570 \u7eaf\u51fd\u6570\u662f\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u6838\u5fc3\u3002\u5b83\u4eec\u4e0d\u6539\u53d8\u5916\u90e8\u72b6\u6001\uff0c\u53ea\u4f1a\u8fd4\u56de\u4e00\u4e2a\u503c\u3002\u8fd9\u4f7f\u5f97\u5b83\u4eec\u6613\u4e8e\u6d4b\u8bd5\u548c\u91cd\u7528\uff0c\u56e0\u4e3a\u5b83\u4eec\u7684\u8f93\u51fa\u53ea\u53d6\u51b3\u4e8e\u8f93\u5165\uff0c\u6ca1\u6709\u5176\u4ed6\u5916\u90e8\u56e0\u7d20\u3002 \u9ad8\u9636\u51fd\u6570 \u9ad8\u9636\u51fd\u6570\u662f\u63a5\u53d7\u6216\u8fd4\u56de\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u7684\u51fd\u6570\u3002\u5b83\u4eec\u5141\u8bb8\u5c06\u51fd\u6570\u4f5c\u4e3a\u4e00\u7b49\u516c\u6c11\uff0c\u4ece\u800c\u53ef\u4ee5\u8f7b\u677e\u521b\u5efa\u52a8\u6001\u548c\u53ef\u91cd\u7528\u7684\u4ee3\u7801\u3002 \u5b9e\u6218\u6848\u4f8b \u4ee5\u4e0b\u662f\u4e00\u4e2a Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u4ee3\u7801\u91cd\u7528\u7684\u5b9e\u6218\u6848\u4f8b\uff1a import java.util.List; import java.util.stream.Collectors; public class CodeReuse { public static void main(String[] args) { \/\/ \u521b\u5efa\u4e00\u4e2a\u5b57\u7b26\u4e32\u5217\u8868 List<String> names = List.of(“John”, “Jane”, “Peter”, “Mary”); \/\/ \u4f7f\u7528 FilterStream \u96c6\u5408\u8fdb\u884c\u8fc7\u6ee4 List<String> filteredNames = names.stream() […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-47231","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/47231","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=47231"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/47231\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=47231"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=47231"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=47231"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}